Steam-boiler



L. ZELLER.

STEAM BOILER.

No Model.)

No. 316,214. Patented Apr.'21, 1885..

Ilflllllll'lllllilllli ATTORNEY N Pains, Phplmulhognpher. Wlllingiu l. u. c.

rrrc,

arsm LOUIS ZELLER, OF MASSILLON, OHIO.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. $16,214:, dated April 21, 1885.-

Application filed September 15, 1884. (X0 model.)

To all whom it may concern.-

Be it known that I, LOUIS ZELLER, of Massillon, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in steam-boilers, the object being to provide a boiler of such construction that the outer shell or casing may be easily and readily removed from around the inner shell without the ne cessity of cutting rivets, but, on the contrary, by merely removing a single row of bolts.

A further object of my invention is to soconstruct a boiler that the outer casing, inner casing, and-the fire-box may be separated or secured together by means of a single row of bolts, which connect two rings at the bottom of the boiler.

With these ends in view my invention consists of two shells, one within the other, in combination with a base or fire-box.

My invention further consists in the combination, with two shells, one within the other, of a base or fire-box and rings secured to the lower ends of the shells and connected to the fire-box by a single row of bolts.

My invention further consists in certain novel features of construction and combinations of parts,as will be hereinafter described, and pointed out in the claim.

In the accompanying drawings, Figurel is a vertical sectional view of my improved boiler, and Fig. 2 is a cross-section showing the arrangement of the water-tubes within the inner shell.

A represents the outer shell or casing, the upper end of which is secured to the top 13, and to the lower is secured the metal ring 0, provided with the inwardly-bent flange O. WVithin this outer casing or shell is located the inner shell, D, which is preferably of a rectangular shape, the corners being rounded, as shown in Fig. 2 of the drawings.

Within the shell D are located the watertubes E, preferably arranged as shown, each alternate layer of tubes being placed at right tween the inner and outer casings, sufficient space being left between the tubes for the circulation of heat.

To the upper end of the inner casing, D, is secured the top or flue G, adapted to carry off the heat and smoke after passing up between the tubes E, which flue extends up through a central opening in the top B of the casing A, said top B being provided with a stuffing-box, H, around the opening, filled with asbestus or other desired material to prevent the escape of steam from the chamber F.

On the lower end of the casing D is secured the ring I, provided with the outwardly-bent flange K, on which reststhe flange O of the ring 0, said flanges O K being provided with a series of registering bolt-holes. Below these casings is located the firebox L, preferably lined on the inside with fire-brick M, the upper end of said box L being thickened and bent over,forming a flange, N, also provided with a series of bolt-holes near its outer edge, registering with those formed on the flanges O K, the flange on said box supporting the inner casing. Through these holes pass bolts which securelylock the rings and fire-box together, and thereby securely hold the latter and two casings in their proper relative positions. WVhen desired to remox e the boiler from the fire-box, or when it is desired to separate any two or all three of said parts, it is simply necessary to remove one row of bolts, thereby avoiding the necessity of cutting rivets and saving time, expense, and labor.

As stated, the fire-box may be either lined on the inside with fire-brick, or be cast or formed hollow direct with the boiler, thereby completely surrounding the fire with said water-space, and thus securing additional heating-surface with increased durability of the fire-box.

It is evident that some slight changes in the construction and arrangement of the different parts of my improvement might be resorted to without departing from the spirit of my invention. Instead of the fire-box being made of cast metal it may be formed of boiler-plate. Again, the boiler may be horizontal as well as vertical; hence I would have it understood I provided at its upper end with a flange which that I do not'restrict myself to the exact conforms a seat for the outwardly-projecting I 5 struction and arrangement of parts as shown flange of theinner casing, the said casings and and described; but, fire-box being secured together by a single Having fully described my invention, whatI row of bolts, substantially as set forth. claim as new, and desire to secure by Letters In testimony whereof Ihave signed this Patent, is specification in the presence of two subscrib- 20 In a steam-boiler. the combination, with an ing witnesses. inner casing provided at its lower end with an outwardly-projecting flange and an outer casing provided with inwardly projecting flange adapted to rest on the outwardly-projecting flange of the inner casing, of a fire-box LOUIS ZELLER.

Witnesses:

ROBERT H. FOLGER,

LENERD Hnss. 

